Recording, Type 837B, (to increase sharpness) (discontinued) Release Positive, Type 803B, High speed, normal grain (discontinued) Fine Grain Release Positive, Type 825B, for optimum picture and sound quality (discontinued) Title Stock, Type 805B, a high contrast film (discontinued) Low Contrast Positive, Type 824B, for kinescope recording (discontinued) The list below is from 1960; "A" was 16mm, "B" was 35mm. Superior 2, Type 936 B and A (ASA 125 Day, 100 Tungsten) B&W (discontinued) Superior 4, Type 928 B and A (ASA 320 Day, 250 Tungsten) B&W (discontinued) Panchromatic Film, Type 914A (could be used as negative or reversal) B&W (discontinued) Rapid Reversal Film, Type 930A (could be used as negative or reversal) B&W (discontinued) High Speed Rapid Reversal Film, Type 931A (could be used as negative or reversal) B&W (discontinued) The list below is from 1966; "A" was 16mm, "B" was 35mm. Fine Grain Superior 2 Negative, Type 936 B and A (ASA 125 Day, 100 Tungsten) B&W (discontinued) Superior 3 Negative, Type 937 B and A (ASA 250 Day, 200 Tungsten) B&W (discontinued) Superior 4 Negative, Type 928 B and A (ASA 320 Day, 250 Tungsten) B&W (discontinued) Rapid Reversal, Type 930A, (ASA 64 Day, 50 Tungsten) B&W (discontinued) High Speed Reversal, Type 931 B and A (ASA 160 Day, 125 Tungsten) B&W (discontinued) Ultra Speed Reversal, Type 932 B and A (ASA 320 Day, 250 Tungsten) B&W (discontinued) Fine Grain Duplicating Negative, Type 908 B and A, B&W (discontinued) Pan Rapid Reversal Duplicating, Type 910A, B&W (discontinued) Fine Grain Release Positive, Type 825 B and A, B&W (discontinued) TV Recording Film, Type 834 B and A, B&W (discontinued) The 1969 list is identical to 1966. 1969 is the last appearance of DuPont motion picture film stocks in the American Cinematographer Manual. The list below is from 1970; "A" was 16mm, "B" was 35mm. Films marked with ‡ could also be processed as a negative film stock Superior 2, Type 936 B and A, B&W Negative (discontinued) Superior 3, Type 937 B and A, B&W Negative (discontinued) Superior 4, Type 928 B and A, B&W Negative (discontinued) Rapid Reversal, Type 930A, B&W Reversal‡ (discontinued) High-Speed Rapid Reversal, Type 931 B and A, B&W Reversal‡ (discontinued) Ultra Speed Rapid Reversal, Type 932 B and A, B&W Reversal‡ (discontinued) Filmotec/ORWO Filmotec/ORWO is German company in the tradition of Agfa, manufacturing black-and-white materials. The brand ORWO stands for Original Wolfen. ORWO U(niversal)